{
    "type": "object",
    "properties": {
        "difficulty": {"type": "number"},
        "min-probability": {"type": "number"},
        "max-probability": {"type": "number"},
        "karma-factor": {"type": "number"}
    },
    "required": [
        "difficulty",
        "min-probability",
        "max-probability",
        "karma-factor"
    ]
}
